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2014/10/15 ¤U¤È 10:05:07

iphone Programming Glossary: cliprect

iPhone - How do you make a resizable rectangle for cropping images?

http://stackoverflow.com/questions/1971542/iphone-how-do-you-make-a-resizable-rectangle-for-cropping-images

also drawRect void drawRect CGRect rect Drawing code if self.image nil return CGPoint offset scrollView.contentOffset clipRect CGRectOffset self.frame offset.x offset.y UIImage croppedImage image croppedImage clipRect CGContextRef ctx UIGraphicsGetCurrentContext.. scrollView.contentOffset clipRect CGRectOffset self.frame offset.x offset.y UIImage croppedImage image croppedImage clipRect CGContextRef ctx UIGraphicsGetCurrentContext croppedImage drawAtPoint CGPointMake 0 0 Note my cropping view is NOT a descendant..

How to display an image on a MKOverlayView?

http://stackoverflow.com/questions/3891850/how-to-display-an-image-on-a-mkoverlayview

image.CGImage MKMapRect theMapRect self.overlay boundingMapRect CGRect theRect self rectForMapRect theMapRect CGRect clipRect self rectForMapRect mapRect NSUserDefaults preferences NSUserDefaults standardUserDefaults CGContextSetAlpha context preferences.. standardUserDefaults CGContextSetAlpha context preferences floatForKey @ RadarTransparency CGContextAddRect context clipRect CGContextClip context CGContextDrawImage context theRect imageReference image release When I download the image I flip the..

How do I create an image overlay and add to MKMapView?

http://stackoverflow.com/questions/5283741/how-do-i-create-an-image-overlay-and-add-to-mkmapview

image.CGImage MKMapRect theMapRect self.overlay boundingMapRect CGRect theRect self rectForMapRect theMapRect CGRect clipRect self rectForMapRect mapRect CGContextAddRect ctx clipRect CGContextClip ctx CGContextDrawImage ctx theRect imageReference.. CGRect theRect self rectForMapRect theMapRect CGRect clipRect self rectForMapRect mapRect CGContextAddRect ctx clipRect CGContextClip ctx CGContextDrawImage ctx theRect imageReference image release @end Add the overlay to the MKMapView MapOverlay..